Developer who has expertise in Microsoft Graph

Hello, we are a company based en France offering a complete solution to manage consulting firms. We are looking for a developer who has expertise in Microsoft Graph. We would like to develop a feature that can query the Microsoft Grap API to get availability information from Outlook 365 shared calendars in third companies. The feature consists in the correct syntax to make the API calls - and can simply be the right calls written in the Chrome Postman extension - as long as we get the needed information. This can be plainly summarized in asking foo@[login to view URL]'s calendar if he's available between date A and date B. (foo@[login to view URL] being an account from an external company) We have an application created in [login to view URL] with an id and a password. Are you interested in developing this feature for us?